The Exorcism of Roland Doe – The Events that Inspired William Peter Blatty’s The Exorcist Book and Movie

In the late 1940s, in the United States, priests of the Roman Catholic Church performed a series of exorcisms on an anonymous boy, documented under the pseudonym "Roland Doe" or "Robbie Mannheim". The 14-year-old boy was the alleged victim of demonic possession, and the events were recorded by the attending priest, Raymond J. Bishop. Subsequent supernatural claims surrounding the events were used as elements in William Peter Blatty's 1971 novel The Exorcist. In December 2021, The Skeptical Inquirer and The Guardian reported the purported true identity of Roland Doe/Robbie Mannheim as Ronald Edwin Hunkeler (June 1, 1935 – May 10, 2020).

https://en.wikipedia.org/wiki/Exorcism_of_Roland_Doe